References
For Ceanothus
Brizicky, G.K. 1964a. The genera of Celastrales in the southeastern United States J. Arnold Arb. 45: 206-234. Google Scholar
Coile, N.C. 1988. Taxonomic studies on the deciduous species of Ceanothus L. (Rhamnaceae). Ph.D. dissertation, Univ. of Georgia, Athens. Google Scholar
Fross, D., and D. Wilken. 2006. Ceanothus. Timber Press, Portland, OR. 272 pp. Google Scholar
Medan & Schirarend. 2004. In Kubitzki, K., ed. 2004. The families and genera of vascular plants. VI. Flowering plants – Dicotyledons – Celastrales, Oxalidales, Rosales, Cornales, Ericales. Springer, Berlin. 489 pp. Google Scholar
Schmidt, C.L., and D.H. Wilken. 2016. Ceanothus. In Flora of North America Editorial Committee. 2016. Flora of North America north of Mexico. Volume 12, Magnoliophyta: Vitaceae to Garryaceae. Oxford Univ. Press, New York, NY. 603 pp. Google Scholar